I'm just looking at those aswell, I think the hex drive ones would be the ones to go for. But the £1.00 each ones actually look like they might be narrower than the OEM nuts, are they the ones you are asking about, Id like to know what drive they are aswell.
edit: I mean Nissan fitment, I assumed Jord would be wanting Nissan aswell, same thread diameter though so would have thought they'd be the same drive ???